Active and passive combined sound absorption door/window ventilation device

Abstract

The invention discloses an active and passive combined sound absorption door / window ventilation device which comprises an air inlet, an air outlet, a ventilation duct, an axial flow exhaust fan, a passive sound absorption device and an active noise control device. The active noise control system comprises an active controller, a peripheral circuit, a reference sensor, error sensors and control sound sources. The control sound sources and the error sensors are arranged on the back side of the exhaust fan at the air outlet. The reference sensor is arranged in the position of the air inlet. According to the active and passive combined sound absorption door / window ventilation device, forced air exhaustion is conducted through the axial flow exhaust fan, so that indoor ventilation and air exchange are achieved. Sound absorption materials and sound absorption structures are laid on the inner wall of the ventilation duct so as to conduct sound absorption control on medium-high frequency noise. Low-frequency noise is controlled by the active noise device. The active and passive combined sound absorption door / window ventilation device can be arranged on any side of a door / window and has good wide-frequency sound absorption performance, good ventilation performance can be provided, and noise pollution can be prevented and controlled.

Description

technical field [0001] The invention relates to a noise control system and a ventilation system, in particular to a noise control system and a ventilation system used in building doors and windows. Background technique [0002] With the continuous advancement of the pace of urbanization in my country, urban noise pollution in China has become an important part of environmental pollution. Urban traffic noise, construction noise, entertainment noise, etc. all affect people's work and life. However, 80% of the noise in the house enters through windows and doors. If you want to get a quiet life, installing soundproof doors and soundproof windows is a better choice. However, ordinary soundproof windows have the problem of "noisy noise when opening the window, suffocation when closing the window", which cannot fundamentally solve this problem. [0003] The ventilation and sound insulation windows that have emerged in recent years can play a role to a certain extent. The sound abs...

AI Technical Summary

Problems solved by technology

But for low-frequency noise below 200Hz, the above measures are difficult to play a role

The low-frequency sound absorption and insulation capacity of ventilation and sound insulation windows will be greatly reduced, which greatly affects the practicability of sound insulation windows

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